| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 64c - Piedmont Uplands | |
| Current Drought Status: | Severe Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 19383 - West Chester, PA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 23 | 30 | 40 | 50 | 59 | 64 | 62 | 55 | 43 | 34 | 26 | 42 |
| Avg Max Temp (°F) | 39 | 42 | 52 | 63 | 73 | 81 | 85 | 84 | 77 | 66 | 55 | 44 | 63 |
| Avg Precip (In.) | 3.92 | 3.04 | 3.98 | 3.79 | 4.53 | 4.16 | 4.55 | 3.77 | 4.75 | 3.38 | 3.94 | 3.71 | 47.51 |